Find out how many calories your body burns at rest and plan your nutrition accordingly
Your Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic life functions such as breathing, circulation, and cell production while at complete rest. This calculator uses the Mifflin-St Jeor equation, widely regarded as the most accurate BMR estimation formula for the general population.
BMR (Basal Metabolic Rate) is measured under strict conditions — complete rest, fasting for 12 hours, and a controlled environment. RMR (Resting Metabolic Rate) is slightly less restrictive and usually 5-10% higher than BMR. In practice, the terms are often used interchangeably, and the Mifflin-St Jeor equation estimates BMR.
Yes, building muscle through resistance training is the most effective way to increase your BMR, since muscle tissue burns more calories at rest than fat. Other factors that influence BMR include age (it decreases with age), genetics, and hormone levels. Very low-calorie diets can decrease BMR.